package com.elvis.builder;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * The intention of the Builder pattern is to find a solution to the telescoping constructor
 * anti-pattern. The telescoping constructor anti-pattern occurs when the increase of object
 * constructor parameter combination leads to an exponential list of constructors. Instead of using
 * numerous constructors, the builder pattern uses another object, a builder, that receives each
 * initialization parameter step by step and then returns the resulting constructed object at once.
 * <p>
 * The Builder pattern has another benefit. It can be used for objects that contain flat data (html
 * code, SQL query, X.509 certificate...), that is to say, data that can't be easily edited. This
 * type of data cannot be edited step by step and must be edited at once. The best way to construct
 * such an object is to use a builder class.
 * <p>
 * In this example we have the Builder pattern variation as described by Joshua Bloch in Effective
 * Java 2nd Edition.
 * <p>
 * We want to build {@link Hero} objects, but its construction is complex because of the many
 * parameters needed. To aid the user we introduce {@link Builder} class. {@link Hero.Builder}
 * takes the minimum parameters to build {@link Hero} object in its constructor. After that
 * additional configuration for the {@link Hero} object can be done using the fluent
 * {@link Builder} interface. When configuration is ready the build method is called to receive
 * the final {@link Hero} object.
 *
 */
public class App {

    private static final Logger logger = LoggerFactory.getLogger(App.class);

    public static void main(String[] args) {

        Hero mage =
                new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK)
                        .withWeapon(Weapon.DAGGER).build();
        logger.info(mage.toString());

        Hero warrior =
                new Hero.Builder(Profession.WARRIOR, "Amberjill").withHairColor(HairColor.BLOND)
                        .withHairType(HairType.LONG_CURLY).withArmor(Armor.CHAIN_MAIL).withWeapon(Weapon.SWORD)
                        .build();
        logger.info(warrior.toString());

        Hero thief =
                new Hero.Builder(Profession.THIEF, "Desmond").withHairType(HairType.BALD)
                        .withWeapon(Weapon.BOW).build();
        logger.info(thief.toString());

    }
}
